Type-writing machine.



A. G. P. KUROWSKI.

TYPE WRITING MAUHINE.

APPLICATION FILED 1n. 3, 1910.

954,637. Patented Apr. 12,1910.

9 SHEETS-SHEET 1.

A. G. F. KUROWSKI.

TYPE WRITING MACHINE.

APPLIOATIOH TILED n.3, 1910.

954.637. Patented Apr. 12, 1910.

2 BHEBTS-BHEET 2.

, sucoee ing notch of the irreg lar line-space UNITED STATES PATENTOFFICE.

ALFRED G. F. KUROWSKI, OF NEW YORK, N. Y., ASSIGNOR TO UNDERWOOD TYPE-WRITEB COMPANY,

OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Apr. 12, 1910.

-To all whom it may concern:

Be it known that I, ALFRED G. F. Konow am, a citizen of the UnitedStates, residing in New York city, borough' of Bronx, in the county ofNew ,York and State of New York, have invented certain new and usefulImprovements in Type-Writing Machines,

of which the'following is a specification.

This invention relates to line-feeding devices for typewriting machines,especially those in which a revoluble cylindrical platen is employed.

One of the main objects of the invention is to equip a machine, of thisclass, as for instance the well known Underwood typewriting machine,with inexpensive and readily applied mechanism for enabling the operatorto effect line-spacing at intervals not agreeing or corresponding withthe usual intervals. This enables the operator to write upon specialruled blanks.

In the form of the invention illustrated in the drawings, the machine isequipped with means for enabling the operator to produce uncven orirregular line-spacing. For this purpose, a special line-space wheel isemployed, the notches therein corresponding to the spacing of the lineson the ruled blank which is to be written upon. A spring detent engagesthe notches of this special linespace wheel to hold the platen steadyduring the writing operation.

The platen is advanced either by means of the knob usually fixed on theplaten axle or by means of 'a line-space lever and driving pawl.Preferably the lever and pawl are employed and overthrow of theplaten'at the line-spacingoperation is prevented by means of a stop pawlwhich rules upon the periphery of the irregular line-space wheels, andclicks into the notches'thereof one after another,'always serving toarrest the platen at the proper point; the line-space detent alreadymentioned being arranged to become seated in the same notch that ISoccupied by said stop pawl. The latter, upon the return stroke of theline-space lever, is automatic ally withdrawn from the irregular linesace wheel, to permit independent rotation o the platen in eitherdirection; but upon 'the succeeding advance stroke of the linespacinlever the stop-pawl falls into the wheel, to arrest thesame again;

i In order tofenablc the use of thesame regular ratchet wheel. T

machine for writing evenly spaced lines in the ordinary manner, wheneverdesired, said line-space lever and pawl are caused to cooperate with anevenly spaced line-space wheel, the latter having the usual detent andthe usual means to prevent overthrow at the line-spacing operation.

Alswitc'lnng lever is provided to throw out either detent when the otheris in use, so that the platen may be controlled alternatively by saiddetents. Said switching lever, when throwing oif the detent from theregular line-spacing ratchet, concomitantly silences the stop-pawl abovementioned, so thatthc entire special irregular spacing devices aresilenced whcnvthe machine is used for even line spacing. Said switchinglever may also be thrown to a third position to release both of thespring detents as well as i the stop'pawl, to permit fine or irregularrotative adjustments of the platen by means of the usual knob, when reuired.

It will be understood t at both the even and uneven line-feedingmovements of the platen may be elfected by the line-feeding lever anddrive-pawl usuallyprovided on said Underwood machine, said pawl alwaysengaging the teeth of the regular ratchet wheel, and the latter beinfixed to the irfie strokes of the line-feeding lever vary in lengthaccording tothe distance between the succeeding teeth of the irregulirratchet wheel; but it is found in practice that the irregularlinefeeding can be effected in this we the rangeof movement of saidlever an pawl being great. enough for the purpose of ordinary irregulariine-spac ing. In otherwords, the capacity of the usual line-spacingmeans, bein equal to three notches ofthe usual even y spaced ratchet, isfound great enough to accommodate the longest movement reguired inordinary irregularline-spacing,

f course the range of movement of the" is a. perspective view of one end0 platen frame and platen of an f the front strike writing machine,showing the 2 is a erspective view 0 two spring detents and t estop-pawl, together with a single stud upon WlllCh they ma all beivoted. Fig. 3 is an end view 0 the me anism, showing the parts innormal positions, but arranged for irregular linespacin Fig. 4: is arear view of one end of the p aten and its appurtenances. Fig. 5 is aview similar to Fig. 3,'but showing the platen as being rotated foruneven line-spacing. Fig. .6 is a view similar to F '5, but showing theparts at the end of a lineacing stroke, the

platen being arrested by t e e agement of the stop-pawl with a notch ofte i lar line-space wheel. Fig. 7 is a view s' or to Fig. 6, but on a ierr'scale, and showing the enga ment of t e'stoppawl with the notch aittle in advance of the seating the spring-detent in the same notch, thestop-pawl having a. yielding construction to permit a slight fartheradvance of 'the ratchet wheel before arresting the same. Fig. 8 is aview similar to Fig. 6, but showing the irregular line-spacing devices,as

silenced, and the platen as under the control of the .regular or evenline-spacing mechanism. Fig. 9 is a view show' the platen released fromthe control of all the linespaoing devices. 1*" 10 is an elevation ofone form of ir ar line-spacing ratchet wheel. It will be understood thatthe ratchet wheels may be cut in various ways to suit variousrequirements. i

. In said Underwood machine, types strike upon the front side of a laten1, to which is fixed an axle 2, where y it is revolubly mounted intheends 3 of a platen 'frame 4. Upon said axle is fixed an evenly spacedlinespace wheel 5, with which engages a spring-detent 6, which holds theplaten steady during the writing. The line-feeding may be efi'qctedeither by a'kriob 7 "on the platen axle, or by a drive-pawl 8 pivoted at9 on a slide 10, guided for forward and backward movement in the-end 3orthe platen frame. A'lever, 11, 'fulcrumed at 12 upon the carria ingsaid slide; t e latter bemg returned by a spring 14. The length ofthe'strokeof the sli e 10; is determined by a regulator 15. Saidregulator 15 is pivoted to a horizontal link 16, Fig, 3, having aprojection 17.to engage a nose or beak 18 formed upon the pawl 8,-tolift'said pawl clear of the ratchet wheel 5 on the completion of thereturn stroke of the slide 10. Overthrow of the platen at the regularline-spacing operation.-

18 prevented by the engagement 'ofsaid nose with a stop 19 fixed u onthe platen frame end 3. As so .far descri ed, the several partshave-long been in use upon said Underwood machine. A second ratchetwheel 20,-hav- 13, is employed for drivspaced notches 21, is fixed tothe even linespace wheel 5, or to the platen axle 2, sons to rotate withthe platen. Pivoted upon the same stud 22 that carries the usual detent6, is a second detent arm 23 ressed down by a spring 24 2) to seat aroll 25 in one of thenotohes 21 of the irregular linespace wheel .20;said roll being pivoted upon the forward end of the detent arm 23, and

said spring )bing preferably coiled ing determined by the position 0 Ithe regulator 15, which is shown in the drawings as set for a tripleline-space movement of the platen at every stroke of the lever 11.

' When it is desired to write upon a card or blank having lines ruledunevenly to correspond withthe spacingv of the notches 21 in t e wheel20, the card is inserted under the teeth 26 of a card-holder 27, or isgripped by a card-holder such as shown in the patent to John C.McLaughlin, "No. 816,174 of March 27 1906; the card-holder having afixed position relatively to the platen, and

hence to the irre lar line-space wheel20,-so

that when the etent 25 1s seated in any notch 21, the correspondingruled line on the blank card or sheet is in register with the printingpoint, so that the type impressions will fall properly u on said line. Ahandle 28 is graspe and t rown downwardly from .the position at Fig. 8to that at Fig. 3, thus swinging b'ackwardly and downwardly a twesarmedswitch or switch-lever 29, which is pivoted loosely upon the platen axle2. Said lever has on one arm a cam 30, which engages the pro'ecting axlepin 31, upon hichis pivote the detent-roll 32 of the etent 6, and swingsroll 32 clear of the ratchet wheel 5; sa 31 then seating itself in anotch 33in the arm 34 of said switch lever, whereby the detent roll 32is mechanically held in silenced osition. The spring 24 now presses theetent roll 25 against the periphery of the wheel 20 and into the notchesthereof. 0 eration of the lever 11 will cause the pawl to engage theteeth of the ratchet wheel 5 and rotate. the

platen; but the extent of such rotation is .now determined by astop-pawl 35 mounted screw-stud 22. ,A spring 37 coiled about Said stud22 tends toswing said frame in 'a direction to carry the pawl ,afidowninto en- -"wheel 5. At thesame time,

acaesv gagelnenl with the irre ular I wheel; said spring, prcferah yhaving a hearing at one end against the hack of the detent arm 0. Owingto the pressure of said spring, the pawl 35 is forced into thesucceeding notch of the advancing line space wheel 20, and positivelyarrests the platen, and thereby mechanically determines the extent of:the line-feeding movement thereof. At the same time the detent Q5 fallsinto the same notch 21 that is occupied by said steppawl 35; the wheel20 being made extra wide for this 'urpose as seen at Fig. 4. The detent25 ll0l( s the platen steady during the writing of a line.

Upon release of the lever 11, the spring l4 returns the slide 10, pawl8, and the lever it back to normal iositions; and a cam 38 upon-the rearend oi the slide 10 engages the pawl frame 26 at a point back of thepivot and depresses said frame, causing its forward end to rise, thuslifting the stop-pawl 35 clear of the irregular line-space wheel 20, asat. Figs. 1 and 3. This permits independent advance rotation of theplaten, if it should he desired. At this moment, a spring 39 snaps thepawl 35 forwardly toward the succeeding tooth or notch in the irregularlinespace wheel 20, so that said pawl cannot immediately rengage thesame tooth, but must coiiperate with said succeeding tooth to effect thenext arrest of the platen.

It will he understood that. at the initial portion of the next rearwardstroke of the slide 10, said cam will release the pawl frame 36 andpermit the spring 37 to swing the stop-pawl 35 down into the succeedingnotch of the wheel 20, to arrest. the same. The movement of the pawl 35,independent of the frame 36, is permitted and limited by reason of theengagement of slots 40 formed in said pawl with guiding pins 41 providedon the inner side of the frame 86. spring 39 )ulls the pawl forwardly,the front end oi the spring being caught onthe front pin 41 and the rearend thereof'bein caught upon an ear 42 formed on the pawl When it ISdesired again to use the machine for even line-spacing, the handle 28 isswung from the position at Fig. 3 to the position at Fig. 8, permittingthe detent 32 to resume its normal relation with the even ratchet an arm43 of said two-armed lever :29 swings forwardly, so that a lip 44 onsaid arm engages and forces up the detent 25, thus silencing the same;said detent seating in a notch 45 in the arm 43 or in the lip44, andholding the two-armed lever 29 stationary. Said hp 44 also cams thestop-pawl 35 upwardly, thereby silencing the same as at Fig. 8Bypressing the handle 28 still farther upwardly, the switch-lever isswun to the osition at. Fig. 9, to throw ed the dent-r0132 as well asdecent-roll 25 and stop-pawl 35. A cam 46 line-space The on saidswitch-lever engages the pin 31 of the detent-roll 32, and swings saidroll clear of the wheel 5, said pin falling into a notch 47 to hold theswitch'levcr steady. The lip 44 is long enough to hold the dctent-roll.35 and the stop-pawl 35 both out of use at this time, as at Fig. 9. Theplaten may now be turned freely in either direction to any pointrequired.

Variations may be resorted to within the scope of the invention, andportions of the improvements may he used without others; certainfeatures of the invention, for instance, not being limited to machines'in which an even line-spacing mechanism is employed.

Having claim:

1. The combination of a platen, a ratchet having unevenly spaced teethor notches, a detent to engage said teeth or notches to hold the platenstationary during the writing of a line, means to advance said platen,and a stop pawl to engage the teeth of said ratchet to limit the advancemovement of the platen.

2. The combination of a platen, a ratchet having unevenly spaced teethor notches, a detent to engage said teeth or notches to hold the platenstationary during the writing of a ine, means, including a reciprocatorylever, to advance said platen step by step, and a stop pawl to engagethe teeth of said ratchet to limit the advance movement of the platen.

3. The combination of a revoluble platen, a ratchet wheel thereforhaving unevenly spaced teeth or notches, a platen frame, a spring detentto engage the teeth or notches of said ratchet wheel to hold the platenstationary means, including a reciprocatory lever and driving pawl, toeffectthe uneven thus described my invention, I

linedieedmg rotative movements of said platen, and a sto pawl to engagethe teeth or notches of sai ratchet wheel to determine the extent of theline-spacing movements of the platen.

4. The combination of a revoluble platen, a ratchet wheel thereforhaving unevenly spaced teeth or notches, a platen frame, a spring ofsaid ratchet wheel to hold the platen stationary means, including areciprocatory lever and driving pawl, to effect the uneven line-feedinrotative movements of said platen, an or notches of sai ratchet whee todetermine the extent of the line-spacing movements of a sto pawl to'enage the teeth detent to engagethe teeth or notches the platen; meansbeing connected to said lever and effective upon the to normal position,to release said sto pawl from said ratchet wheel and to e eet an advancemovement of the stop pawl toward the succeeding tooth or notch in saidratche wheel. i

return thereof including a pawl and ratchet, a secon ratchet, the latterhaving unevenly spaced teeth, a detent to engage the second ratchet tohold the writing of a line, and a stop pawl to engage the teeth of thesecond ratchet to limit the line-spacing stroke of said reciprocatingdevices. 1

6. The combination with a platen, of a re ciprocatory line-feedingmechanism therefor including a pawl and ratchet, secon ratchet, thelatter having une'ien% spaced teeth, a detent to engage the seconratchet to hold the platen stationary during the writing of line, and astop pawl to'enga the teeth of the second ratchet to limit theline-spacing stroke of said reciprocating devices, means being connectedto said reciprocatory devices to release said stop pawl after the arrestof the platen thereby.

7. The combination with a platen, of a reciprocatory line-feedingmechanism therefor, including a pawl and ratchet, a second ratchet, thelatter having unevenl spaced teeth, a detent to engagethe second ratchetto hold the laten stationary during the writing of a line, and a stoppawl to engage the. teeth of the second ratchet to limit theline-spacing stroke of said reciprocating devices, means being connectedto said reciprocatory devices to release said stop pawl after the arrestof the platen thereby, and means being provided to cause said stop pawl,when released, to advance toward the next tooth of the second ratchet. I

8. The combination with a platen, of a reciprocatory line-feedingmechanism therefor including a pawl and ratchet, a second ratchet, thelatter having unevenly spaced teeth, a detent to engage the secondratchet to hold the laten stationary during the writing of a line, astop pawl'to engage the teeth of the second ratchet to limit thelinespacing stroke of said reciprocating devices, a returning spring forsaid line 7 feeding mechanism a cant caused by said spring to engagesaidstop pawl to release 'thesame, an a s ring to advance said stop awl,when release toward the next tooth o the second ratchet. i

9. The combination with a movable platen and means to advance the samein line-space direction, of a line" space wheelor device therefor havinseparatedgroups of line flpace notches ormed therein, and a spring etentto ride upon theperiphery or surface of said wheel to snap in thenotchesand hold the platen steady during the writing of thelines'; the portionsof the wheel between the notches or groups left substantially full oruncut, to mnkeidead surfaces for the detcntw jde idLj ;:oVcr, sp that itplaten stationary during theboth a detent and a stop either the firstdetent or said sto ingofa may control the platen only by falling intothe line-spacing notches.

10. The combination with a movable .p aten provided with both anevenly-spaced r tchet and an unevenl spaced ratchet, of

ratchets, of a detent 'for one of sai ratchets' both a detent and a stoppawl for the other 0 said ratchets, and means shiftable to silenceeither the first detent or said stop pawl together with the seconddetent.

'12. The combination with a movable platen provided with difi'erentlratchets, of a detent for one of mi ratchets, pawl for the other of saidratchets, means shiftable to silence pawl together with the seconddetent, an a driving. pawl and lever for one of said ratchets.

13. The combination with a movable platen V provided with difi'erentlspaced ratchets, of a detent for one of saitl ratchets, both a detentand a stop pawl for the other of said ratchets means shiftable tosilence either the first detent or said stop pawl together with thesecond detent, a drivin pawl and lever for one of said ratchets,an ashiftable regulating device for controlling the length of theline-feeding movement of the platen efiected by said pawl and lever.

14. The combination with a revoluble platen, of an evenly-spaced ratchetconnected thereto, a driving pawl for said ratchet, a

lever for said driving awl, a' detent for said ratchet, a second rateet, the latter having unevenly spaced teeth and also connected to saidplaten, a detent for said second ratchet, a stop pawl to engage saidsecond ratchet, and means for silencing either the first detent, or saidstop pawl together with the sec- 0nd detent 1 16. The combination of alaten, a ratchet having Tinevenly spaced -teeth or notches, a detent toengage said teeth or notches to hold "the lplaten stationary during thewritne, means to advance said platen a stop pawl to engage the teeth ofsai ratchet to limit the advance movement of spaced iii;

the platen, and means for'silencing said d'etent midfield-stop pawlconcomitantly:

17. The combination with a mo Jib!" l ratchet wheel andanuni-W1ily-spacedratchet platen, of means, including an evenly-spacedratchet connected therewith and a driving awl for said ratchet, forfeeding the platen ine by line through even intervals, and means,including an unevenly-spaced ratchet and a detent therefor, foreffecting uneven line-spacing or feeding of the platen at'will.

18; The combination of a revolublc platen, a ratchet wheel thereforhavin 'nn evenly spaced teeth or notches, a patch frame, a. springdetent to engage the teeth or notches of said ratchet wheel to hold theplaten stationary, means, including a reciprocatory lever and drivingpawl, to effect the uneven line-feeding rotative movements of saidplaten, a stop pawl to engage the teeth or notches of said ratchet wheelto determine the extent of the line-spacing move ments of the platen,and means to enable said lever and pawl to effect uniform line feedingmovements of said platen to an indefinite extent, at will.

19. The combination of a revolnble platen, a ratchet wheel thereforhaving unevenly spaced teeth or notches, a platen frame, a springdetent'to engage the teeth or notches of sa d ratchet wheel t 'holdthe-platen Stationary, means, including a reciprocatory lcver anddriving pawl, to effect the uneven line-feeding rotative movements ofsaid platen, a stop pawl to engage the teeth or notches of said ratchetwheel to determine the extent of the line-spacing n'iovements of theplaten, means being connected to said reciprocat'ory devices to releasesaid stop pawl after the arrestof the platen thereby, and means toenable said lever and pawl to effect uniform line-feeding movements ofsaid platen to an indefinite extent, at will.

20. The combination with a movable platen provided. with differentlyspaced ratchets, of a detent for each of said ratchets, and shiftab lemeans for either silencing both ratchets concomitantly or silencingeither detent and concomitantly bringing the other detent into use. i, a

21. The combination with a platen provided with differently spacedratchets, of detents for. said ratchets, a stop pawl for one of saidratchets, and shiftable means for either silencing both said detents andsaid pawl concomitantly, or silencing either one of said detents or saidstop pawl together with the other of said d etents.

22. The combination with a revolnble platen provided with both anevenly-spaced ratchet wheel and an n nevenly-spaced ratchet wheel, ofmeans to engage the ratchet wheels to hold the platet-steady during thewriting operation, and shittahle means for enabling the platen to becontrolled or detained by either ratchet wheel at will.

23,"l he con'ibiimtion with a revoluble platen provided with both anevenly-spaced wheel, of means to engage the ratchet wheels to hold theplaten steady during the writing operation, and shiftable means forenabling the platen to be controlled or detained by either ratchet wheelat will, or to free the platen from the control of both said ratchetwheels at will.

24. The combination with a platen, of a ratchet wheel connected thereto,a lever having means to drive the ratchet wheel. a stop pawl, a pivotedframe upon which said stop pawl is mounted for independent movement, aspring to press said pawl into engagement with said wheel, means to holdsaid frame in pawl releasing position when the line spacing devices arein normal position, and to permit the pawl to engage the ratchet 'wheelat the initial portion of the platen .driving stroke of the line spacingdevices,

means tending to advance said pawl upon said frame toward the succeedingtooth of the ratchet wheel, and means to limit the backward movementimparted by said ratchet wheel to said pawl.

25. The combination with a platen, of a ratchet wheel connected thereto,a lever having means to drive the ratchet wheel, a stop pawl, a pivotedframe upon which saidstop pawl is mounted for independent movement, aspring to ress said pawl into engagemept with said W eel, means to holdsaid frame in pawl releasing position when the line 5 ac mg devices arein normal posltlon, an to permit the pawl to engage the ratchet wheel atthe initial portion of the )laten driving stroke of the line spacingevices, 'means tending to advance said pawl upon said frame toward thesucceeding tooth of the ratchet wheel, means to limit the backwardmovement imparted by said ratchet wheel to said pawl, and a detent toenga e the same notch in the ratchet wheel as sairf pawl.

26. The combination with a revolublc platen, of a ratchet wheelconnected thereto, reciprocatorydevices to drive said ratchet wheel andplaten, a second ratchet wheel,

the latter differently spaced from the first,

and a stop pawl to engage said second wheel to arrest the platen whendriven by said reciproeatorv devices.

27. The combination with a rcvolnhlc platen. of a. ratchet wheelconnected thereto, reciprocatory devices to drive said ratcl'iet wheeland platen, a second ratchet wheel, the latter differently spaced fromthe first. a stop )awl to engage said second wheel to arrest. tlieplaten when driven by said reciprocatory devices, and a spring etent toenga ethesame notch in said second wheel as said etc 1' pawl.

, 28. The con'ibination of a platen, a ratchet having unevenly spacedteeth or notches, a ietent toengage said teeth or notches to hold theplaten stationary during the writing of a line, means to advance saidplaten, a sto pawl to engage the teeth of sea ratchet to imit theadvance movement of the platen, and means to release the control of said(latent.-

29. The combination of a revoluble platen, a ratchet wheel thereforhaving unevenly spaced teeth or notches, a platen frame, a spring detentto engage the teeth or notches of said ratchet wheel to hold the platenStile tionary, means including a reel rocatory lever and drivingpawl, toeffect t e uneven linefeeding rotative movements of said platen, a stoppawl to engage the teeth or notches of said ratchet wheel to determinethe extent of the line-spacing movements of the platen; means beingconnected to said lever and eifective upon the return thereof to normalposition, to release said stop-pawl from said ratchet wheel and toefl'ect an advance movement'of the sto -pawl toward the succeed' toothor note in said ratchet wheel an a single device to move and lock saiddetent and stop-pawl away from said ratchet wheel.

30. The combination with a. platen, of a reciprocatory line-feedingmechanism therefor, includin a pawl and ratchet, a detent for said ratcet, a second ratchet, the latter having unevenly spaced teeth, a detentto engage the second ratchet to hold the 'laten stationa during thewriting of a e, a stop-paw to enga e the teeth of the second ratchet tolimit t e line spacing stroke of said reciprocating devices, and a leverhaving means to release said detents in alternatron.

31. The combination with a platen, ,of a reciprocatory line-feedingmechanism therefor, inclurlin 'a pawl and ratchet, a detent for saidratc et, a second ratchet, the latter having unevenly spaced teeth, adetent to engage the secondratchet=to hold the laten stationary duringthe writingofa me, a

stop-pawl to engage the teeth of the second ratchet to limit t eline-spacing stroke of said reciprocating devices, and a lever havingmeans to release said detents either concomitantly or in alternation.

32. The combination with a platen, of a reciprocatory line-feedingmechanism therefor, including a pawl and ratchet, a detent for saidratchet, a second ratchet, the latter having unevenly spaced teeth, adetent to engage the second ratchet to hold the laten stationar stop-pawto enga e the teeth of the second ratchet to limit t e line-spacingstroke of said reciprocating devices, means being connected to said recirocato platen thereby, and means bei provided to cause said stop-pawl,when re eased, to -advance toward the next tooth of thesecond ratchet,and a lever having means to move platen from the during the writing of ame, a

deviceeto lease Sald -p after t e arrest of th and to move and loc saidstop-pawl away from its ratchet together with its associated detent.

33. The combination with a platen, of a reciprocatory line-feedingtherefor, including a pawl, a ratchet wheel, and a detent for saidratchet wheel, a second ratchet wheel, the latter having unevenly spacedteeth, a detent to engage the second ratchet wheel to hold the platenstationary during the vvrutingof a line, a stoppawlto engage the teethof the second ratchet wheel to limit the line-spacing stroke of saidreciprocating devices, a lever havingtwo cams to move the first. detentaway from its ratchet wheel, and means also connectedtosaid lever torelease the second detent, together with. said stop awl, either whenboth of said cams are i e or when one of said cams is in efi'ectiveposition.

34. .The combination with a movable latch and means to advance the samein inc-space direction, of a line space wheel or device therefor havingse arated groups of line space notches forme therein, a spring detent toride upon the periphery or surface of said wheel to snap in the notchesand hold the platen steady during the writing of the lines; the portionsof the wheel between the notches or groups being left substantially fullor uncut, to make dead surfaces for the detent to ride idly over, sothat it may control the platen only by falling into the lines' cingnotches; and means to release the p aten from the control of saidline-space wheel and detent.

35. The combination with a movable platen provided with difierently saced ratchet wheels, of a detent for one 0 said ratphet wheels, botha'detent, and a sto pawl for the other of said ratchet: whee s, and alever havin two cams either of which may release the rst detent, saidlever also having thereon a third releasing cam or de-' vice to releasethe'second detent together platen provided with di fi'erently spacedratchets, of a spring-pressed 'detcnt for one mechanism a of saidratchets, a spnng-presseddetent for the other of said ratchets, and alever having cams thereon for releasing eitherrdetent from its ratchetand concomitantly permitting the other detent to move into engagetnentwith its ratchet.

37. The combination with a platen, of an evenly-spaced ratchet connectedthereto a detent for said ratchet, a second ratchet, the latter havingunevenly spaced teeth and a so connected to said platen, a detent forsaid second ratchet, and a lever having cams thereon for silencing saiddetents either alternatively or concomitantly.

38. The combination with a movable platen, of means, including anevenly-spaced ratchet connected therewith and a drivin pawl and a detentfor said ratchet, for feed ing the platen line by line through evenintervals, and means, including an unevenlys aced ratchet and a detenttherefor, for e ecting predetermined uneven line-spacing or feedmg ofthe platen at will, and means to release the platen from the control ofsaid ratchets -eit er alternatively or concomitantly atwill.

39. Ihe combination with a revoluble platen, of reciprocatory devices todrive said wheel and platen, a ratchet wheel having uneven notches orteeth, a stop-pawl to engage said ratchet wheel to arrest the platenwhen driven by said reciprocatory devices, and means to lock saidstop-pawl away from said ratchet wheel.

40. The combination with a revoluble platen, of a ratchet wheelconnected thereto, reciprocatory devices to drive said ratchet wheel andplaten, a second ratchet'wheel, the latter differently spaced from thefirst, a stop-pawl to engage said second wheel to arrest the platen w endriven by said reciprocatory devices, a spring detent to engage the samenotch in sa1d second wheel as sa1d stop pawl, and means to lock saiddeten't and stopawl away from said second ratchet whee ALFRED G. F.KUROWSKL Witnesses:

RALPH S. WARFIELD, J 01m 0. SEIFERT.

